To Adjust Choke Control; Final Setting; Acceleration Test; To Adjust Carburetor - Craftsman 917.273664 Owner's Manual

TO ADJUST CHOKE CONTROL
The choke control has been preset at the
factory and adjustment should not be nec-
essary, check adjustment as described be-
low before loosening cable. If adjustment
is necessary, proceed as follows:
1. With engine not running, move choke
control (located on dash panel) to full
choke position.
2. Remove air cleaner cover, filter and
cartridge plate to expose carburetor
choke (See 'AIR FILTER" in the Main-
tenance section of this manual).
3. Choke should be closed. If it is not,
loosen casing clamp screw and move
choke cable until choke is completely
closed. Tighten casing clamp screw
securely.
4. Reassemble air cleaner.
Closed For
Choke
TO ADJUST CARBURETOR
The carburetor has been present at the
factory and adjustment should not be nec-
essary. However, minor adjustment may
be required to compensate for differences
in fuel, temperature, altitude or load. If the
carburetor does need adjustment, proceed
as follows:
In general, turning the adjusting needles
in (clockwise) decreases the supply of
fuel to the engine giving a leaner fuel/air
mixture. Turning the adjusting needles out
(counterclockwise) increases the supply
of fuel to the engine giving a richer fuel/air
mixture.
IMPORTANT: Damage to the needles
and the seats in carburetor may result if
screw is turned in too tight.
PRELIMINARY SETTING -
1. Be sure you have a clean air fil-
ter, and the throttle control cable is
adjusted properly (see "TO ADJUST
THROTTLE CONTROL CABLE" in the
Service and Adjustments section of
this manual).
2. With engine off turn idle fuel adjust-
ing needle in (clockwise) closing it
finger tight and then turn out (counter-
clockwise) 1 turn.
FINAL SETTING -
1. Start engine and allow to warm for five
minutes. Make final adjustments with
engine running and shift/motion control
lever in neutral (N) position.
NOTE: The high idle is set at the factory
and cannot be adjusted.
2. Idle speed setting - With throttle control
lever in slow position, engine should
idle at 1750 RPM. If engine idles too
slow or fast, turn idle speed adjusting
screw in or out until correct idle is at-
tained.
3. Idle fuel needle setting - With throttle
control lever in slow position, turn idle
fuel adjusting needle in (clockwise)
until engine speed decreases and then
turn out (counterclockwise) approxi-
mately 3/4 turn to obtain the best low
speed performance.
4. Recheck idle speed. Readjust if neces-
sary.
ACCELERATION TEST -
5. Move throttle control lever from slow
to fast position. If engine hesitates or
dies, turn idle fuel adjusting needle out
(counterclockwise) 1/8 turn. Repeat
test and continue to adjust, if neces-
sary, until engine accelerates smoothly.
High speed stop is factory adjusted. Do
not adjust-damage may result.
IMPORTANT: Never tamper with the
engine governor, which is factory set
for proper engine speed. Overspeed-
ing the engine above the factory high
speed setting can be dangerous. If you
think the engine-governed high speed
needs adjusting, contact a Sears or other
qualified service center, which has proper
equipment and experience to make any
necessary adjustments.
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